To the human ear, it may not sound like anything.

人类的耳朵听来，这个声音可能什么都像。

The human ear can tolerate noise up to 85 decibels without damage.

人类耳朵能忍受的最大安全噪音是 85 分贝。

The sound has been edited so it can be heard by human ears.

声音经过编辑合成，使人耳能够听到。

You will hear two emissions at high frequencies coming from a normal human ear.

你会听到来自正常人耳的两个高频率声响。

To record this, scientists use ultrasonic microphones that detect frequencies human ears can't.

为了记录，科学家们使用了超声波麦克风，这种麦克风可以探测到人耳无法听到的频率。

Did you know that plants actually make sounds that are undetectable to the human ear?

你知道植物实际上会发出人耳无法察觉的声音吗？

A human ear has three different areas: the outer, middle, and inner ear.

外耳，中耳和内耳。

The click beetle's click can be heard by the human ear, but it's not very loud.

人可以听得到磕头虫的发出的“啪啪”声，不过声音不大。

His hearing is better than ours too, tuned to sounds that are completely imperceptible to the human ear.

它的听力也比我们强，能听到人耳完全听不到的声音。

Human ears are most sensitive to frequencies between 2,000 and 5,000 vibrations per second.

人耳对每秒 2,000 到 5,000 次振动的频率最敏感。

The human ear is best at registering sounds above the frequency of 20 hertz.

人耳最擅长记录频率高于 20 赫兹的声音。

Then there's the fact that whales don't have ears exactly like human ears.

还有一个事实是，鲸鱼的耳朵并不完全像人的耳朵。

His work now suggests the human ear can't pick up on what makes them different.

他的工作现在表明人耳无法分辨是什么让它们与众不同。

Ultrasonic waves are at a higher pitch than the human ear can hear.

【pitch】超声波的音高超出了人耳可以听见的范围。

Was he losing his reason and thinking he heard things which were not for human ears?

他是不是失去了理智，以为自己听到了不属于人耳的声​​音？

Neither had made a noise that would have been appreciable to human ears at a dozen paces.

两人都没有发出十几步外人耳可以听到的声音。

Maybe splicing some genes, clone a sheep, perhaps grow a human ear on a mouse's back?

基因拼接 克隆羊 或者在老鼠背上培育人的耳朵？

It was an ugly, little, venomous serpent of a noise, as ever did petty violence to human ears.

这是一条丑陋的、小的、有毒的噪音蛇， 就像对人耳的轻微暴力一样。

Okay, what do we start with? Maybe splicing some genes, clone a sheep, perhaps grow a human ear on a mouse's back?

好的，我们先做什么? 基因拼接，克隆羊，或者在老鼠背上培育人的耳朵？

They're designed to be phonetically balanced and are the result of experiments involving the effects of sound on the human ear.

它们旨在实现语音平衡，是涉及声音对人耳影响的实验结果。